NumberResearchRecent prefix assignments
360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2013-08-02 | 681-408 | 0XXX1XXX2XXX6XXX7XXX · 5 holders which blocks → | CORETEL WEST VIRGINIA, INC. - WV | 5833 | HARRISVL | WV |
| 2013-08-02 | 681-532 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | CORETEL WEST VIRGINIA, INC. - WV | 5833 | MULLENS | WV |
| 2013-08-02 | 681-642 | 0–9 XXXall 10 · 8 holders which blocks → | CORETEL WEST VIRGINIA, INC. - WV | 5833 | ALDERSON | WV |
| 2013-08-02 | 681-797 | 0–9 XXXall 10 · 7 holders which blocks → | CORETEL WEST VIRGINIA, INC. - WV | 5833 | MINERLWLLS | WV |
| 2013-08-02 | 681-823 | 0–9 XXXall 10 · 7 holders which blocks → | CORETEL WEST VIRGINIA, INC. - WV | 5833 | OAK HILL | WV |
| 2013-08-02 | 712-232 | 0–9 XXXall 10 · 9 holders which blocks → | AUREON COMMUNICATIONS, LLC | 444G | SPENCER | IA |
| 2013-08-02 | 712-318 | 0–9 XXXall 10 · 6 holders which blocks → | AUREON COMMUNICATIONS, LLC | 444G | COUNCILBLF | IA |
| 2013-08-02 | 804-292 | 0–9 XXXall 10 · 7 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | RICHMOND | VA |
| 2013-08-02 | 864-603 | 0–9 XXXall 10 · 5 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | GREENVILLE | SC |
| 2013-08-02 | 909-454 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS NETWORKS, LLC | 899D | S BERNDINO | CA |
| 2013-08-01 | 206-981 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | SEATTLE | WA |
| 2013-08-01 | 214-973 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | MCKINNEY | TX |
| 2013-08-01 | 438-464 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Montreal | — |
| 2013-08-01 | 502-325 | 0–9 XXXall 10 · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | SADIEVILLE | KY |
| 2013-08-01 | 516-217 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC- NY | 384C | COLDSPGHBR | NY |
| 2013-07-31 | 305-239 | 0–9 XXXall 10 · 2 holders which blocks → | SMARTEDGENET, LLC | 159H | KEYS | FL |
| 2013-07-31 | 469-283 | 0–9 XXXall 10 · 5 holders which blocks → | SMARTEDGENET, LLC | 159H | DALLAS | TX |
| 2013-07-31 | 587-930 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Edmonton | — |
| 2013-07-31 | 587-970 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Calgary | — |
| 2013-07-31 | 587-971 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Calgary | — |
| 2013-07-31 | 604-429 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2013-07-31 | 604-494 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2013-07-31 | 604-499 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2013-07-31 | 778-923 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2013-07-31 | 778-939 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2013-07-31 | 778-973 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Port Edward | — |
| 2013-07-31 | 909-378 | 0–9 XXXall 10 · 8 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | DIAMONDBAR | CA |
| 2013-07-30 | 204-698 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Winnipeg | — |
| 2013-07-30 | 206-582 | 0–9 XXXall 10 · 6 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7173 | SEATTLE | WA |
| 2013-07-30 | 248-221 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | PONTIAC | MI |
| 2013-07-30 | 306-899 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Saskatoon | — |
| 2013-07-30 | 343-777 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Ottawa-Hull | — |
| 2013-07-30 | 438-926 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Montreal | — |
| 2013-07-30 | 438-927 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Montreal | — |
| 2013-07-30 | 438-928 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Montreal | — |
| 2013-07-30 | 438-929 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Montreal | — |
| 2013-07-30 | 506-300 | not yet reported which blocks → | Iristel Inc. | 154E | Fredericton | — |
| 2013-07-30 | 506-798 | not yet reported which blocks → | Aliant Telecom(NB) | 8090 | Saint John | — |
| 2013-07-30 | 581-922 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Quebec | — |
| 2013-07-30 | 616-202 | 0–9 XXXall 10 · 6 holders which blocks → | XO COMMUNICATIONS SERVICES, INC. - MI | 4125 | GRAND RPDS | MI |
| 2013-07-30 | 616-552 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | GRAND RPDS | MI |
| 2013-07-30 | 647-936 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2013-07-30 | 647-937 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2013-07-30 | 647-939 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2013-07-30 | 647-949 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2013-07-30 | 707-530 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LAKEPORT | CA |
| 2013-07-30 | 916-385 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | ELK GROVE | CA |
| 2013-07-30 | 920-221 | 0–9 XXXall 10 · 5 holders which blocks → | WISCONSIN BELL INC | 9327 | APPLETON | WI |
| 2013-07-30 | 979-312 | 0XXX1XXX2XXX4XXX5XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | FRANKLIN | TX |
| 2013-07-29 | 289-654 | not yet reported which blocks → | TELUS Mobility | 8303 | Brampton | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.